FastCap SB-15X18WH, SpeedBrace 15-Inchx18-Inch White Support Cutout for communication and power wire management Load capacity is 1000 lbs. Per pair on 16 inch centers Durable powdercoated finish Quick install with notch alignment design for fast and easy alignment Communication and power cutout for wire management Load capacity is 500 lbs. Per pair on 16" centers Durable powdercoat paint Quick install with double notch alignment design for fast and easy alignment